Hoisting hook



W. C. CAREY. HOISTING HOOK. APPLIYCATION FILED SEPT. 8. 1921.

1,43%,991 Patented Nov. 7, 1922. v v (A @lmigj WITNESSES 'lNl/E/VTOR M L 75/? C. 6/) RY BY J@Wv66 A TTORAIEYS Patented Nov. 7, 1922.

(SEED WALTER GUI-PIN CAREY, 0F MORRIS PLAINS, NEW JERSEY.

HOISTINGV HOOK.

Application filed. September 8, Serial No. 499,244.

To all whom it may concern.

Be it known that I, WALTER CULPIN CAREY, a citizen of the United States, and a resident of Morris Plains, in the county of Morris and State of New Jersey,- have invented new and Improved Hoisting Hooks, of which the following is a full, clear, and exact description.

The present invention relates to new and useful improvements in hoisting hooks, and it pertains more particularly to hoisting hooks ofthe releasing type.

It is one of the objects of the invention to provide a releasing hoisting hook especially adapted for subaqueous river and harbor work, and more particularly to the hook especially adapted for the placement of mattresses and the like in revetment work.

Another object of the invention is to provide ahoisting hook of the releasing type in which the releasing operation is automatically carried out eliminating the use of auxiliary lines and similar appliances for moving the hook to releasing position.

It is a further object of the invention to provide a releasing hook in. which the hook in its movement to releasing position strips itself, thus insuring of a complete releasing operation taking place.

It is a still further object of the invention to so construct the casing or housing in which the hook is mounted that when the hook is inoperative, it occupies a position within the housing to prevent its becoming entangled with tackle or other foreign ele ments when in use.

With the above and other objects in view, reference is had to the accompanying drawings, in which-- Figure 1 is a vertical sectional view of a hoisting hook constructed in accordance with the present invention;

Fig. 2 is a vertical sectional view taken at right angles to Fig. 1;

Fig. 3 is a detail sectional view taken upon the line 3-3 of Fig. 1.

Referring more particularly to the drawings, the device comprises a housing, and said housing consists of two plates 5, secured together by means of bolts or the like 6, said plates being maintained in spaced relation by means of sleeves or the like 7 which surround said bolts 6. The plates 5 are formed on their lower ends with right-angular portions 8, and said right angular portions 8 terminate in end walls 9, the rear wall of each o'f'said plates being bent-to pro vide bottom walls 10. This structure forms a housing 11, and extending through said housing 11, is a shaft or bolt 12, the ends of which are upset or headed as indicated by the reference character 13, for a purpose to be hereinafter described.

Carried by the shaft 12, is a hoisting hook 14:,and said hoisting hook 14: has a hooked end 15 and an oppositely disposed rigid arm 16. Interposed between the hoisting hook and each of the end walls 9 of the housing 11, is a coil spring 17, and the in nor end of each of. said coil springs 17 is adapted to engage a lug 18 formed on opposite sides of the hoisting hook 14 adjacent the pivotal point of said hook. Pivotally connected as at 20 to the free end of the rigid arm 16, is a chain, cable, or similar hoisting device 21, and said chain or cable 21 passes through an opening 22 in the upper end of the housing formed by the plates 5.

Mounted in the upper portion of the housing formed by the plates 5, is a cam track 25, and said cam track 25 issecured in position by means of bolts 26. 'This cam track isadapted to receive the chain, cable, or other hoisting element 21, when the hook is in the position within the housing, which position is shown in dotted lines in Fig. 1. The bolts which maintain the cam track 25 in posltlon are each provlded with a reduced threaded portion 27 with which a hollow in teriorly screw-threaded cap 28 is adapted to engage to maintain said bolts against accidental displacement relative to the housing, which construction is clearly shown in Fig. 3. i

The housing formed by the plates 5 is provided upon one of its sides with a curved wall 30, and said curved wall 30 is adapted to receive the hook when the same is within the housing, as indicated by the dotted line position in Fig. 1. Oppositely disposed with respect to the curved wall 30, and carried by one of the bolts 6 which serves to maintain the plates in spaced relation, is astop or the like 31, and said stop is adapted to receive the rigid arm 16 of the hoisting hook when the several parts are in the position shown in dotted lines in Fig. 1.

The device operates in the following manner: The hook 15 is engaged with the article to be moved and as the strain due to the weight of the article is brought upon the hook, the latter is moved about its pivotal point to the full line position shown in Fig.

1. This movement oi the hook to this posi tion places the springs 17 under tension and said springs are maintained under tension so long as the hook is under strain.

When the article to be moved has been brought to rest and the strain relieved, the book, under the tension of the springs 17, moves to the dotted line position shown in Fig. 1 and in its movement to this position, which is interior of the housing, the lower edge ot the housing serves to strip the ring, rope, or other means by which the article to be moved was carried by the hook 15, from said hook. After the hook has been stripped, it occupies a position Whollyvvithin the housing, and thus the housing, 0wing to its peculiar stream-line shape, may be moved ithout interference With or catching upon other tackle, debris, or other foreign matter, which is important in devices employed in this character of Work.

I claim:

1. A hoisting hook comprising a housing, a hook pivotally mounted therein, a rigid arm carried by the hook, means for moving the hook Wholly Within the housing, and means for limiting the movement of the hook Within the housing.

2. A hoisting hook comprising a housing, a hook pivotally mounted therein, a rigid arm carried by the hook, means for moving the hook Wholly Within the housing, and means engaging said hook and said arm for limiting the movement of the hook Within the housing.

A hoisting hook comprising a housing, a hook pivotally mounted in the housing, means for moving the hook to a position wholly Within the housing, and means coacting with the hook to strip the same upon its moven'ient into the housing.

4:. I; hoisting hook comprising a housing, a hook pivotally mounted Within the housing and adapted to maintain a position Wholly Within the housing When in inoperative position, and exterior of the housing in operative position, said hook being maintained exteriorly of the housing .by the strain exerted thereon in operation, and resilient means tor-returning said hook to its position Within the housing upon said operating strain being relieved.

5. A hoisting hook comprising a housing, a hook pivo-taliy mounted Within the housing and adapted to maintain a position Wholly Within the housing when in inoperative position, and exterior of the housing in operative position, said hook being maintained exteriorly of the housing by the strain exerted thereon in operation, and means for limiting the movement of the hook Within the housing.

6. A hoisting hook comprising a housing, a hook pivotally mounted Within the housing and adapted to maintain a position Wholly Within the housing When in inoperative position, and exterior of the housing in operative position, said hook being maintained exteriorly oi the housing by the strain exerted thereon in operation, and means adapted for engagement with the hook to limit its movement Within the housing.

7. A device of the character described comprising a housing, a hook pivotally mounted in the housing, an arm rigidly car ried by said hook, a flexible hoisting member secured to said arm and extending through one side of the housing, a guide for said flexible hoisting member, and resilient means for moving said hook to inoperative position wholly Within the housing, substantially as described.

8. A device of the character described comprising a housing, a hook pivotally mounted in the housing, an arm rigidly carried by said arm, a flexible hoisting member secured to said arm and extending through one side of the housing, a guide for said 'flexible hoisting member, and automatically operated means for moving said hook to inoperatlve position Wholly within the housmg, substantially as described.

WALTER CULPIN CAREY. 

